在 CentOS7 上安裝 zookeeper-3.4.9 服務，centos安裝zookeeper

在 CentOS7 上安裝 zookeeper-3.4.9 服務，centos安裝zookeeper

在 CentOS7 上安裝 zookeeper-3.4.9 服務

1、創建 /usr/local/services/zookeeper 文件夾：
	mkdir -p /usr/local/services/zookeeper

2、進入到 /usr/local/services/zookeeper 目錄中：
	cd /usr/local/services/zookeeper

3、下載 zookeeper-3.4.9.tar.gz：
	wget https://mirrors.tuna.tsinghua.edu.cn/apache/zookeeper/zookeeper-3.4.9/zookeeper-3.4.9.tar.gz

4、解壓縮 zookeeper-3.4.9.tar.gz：
	tar -zxvf zookeeper-3.4.9.tar.gz

5、進入到 /usr/local/services/zookeeper/zookeeper-3.4.9/conf 目錄中：
	cd zookeeper-3.4.9/conf/

6、復制 zoo_sample.cfg 文件的並命名為為 zoo.cfg：
	cp zoo_sample.cfg zoo.cfg

7、用 vim 打開 zoo.cfg 文件並修改其內容為如下：
	# The number of milliseconds of each tick

	# zookeeper 定義的基准時間間隔，單位：毫秒
	tickTime=2000

	# The number of ticks that the initial 
	# synchronization phase can take
	initLimit=10
	# The number of ticks that can pass between 
	# sending a request and getting an acknowledgement
	syncLimit=5
	# the directory where the snapshot is stored.
	# do not use /tmp for storage, /tmp here is just 
	# example sakes.
	# dataDir=/tmp/zookeeper

	# 數據文件夾
	dataDir=/usr/local/services/zookeeper/zookeeper-3.4.9/data

	# 日志文件夾
	dataLogDir=/usr/local/services/zookeeper/zookeeper-3.4.9/logs

	# the port at which the clients will connect
	# 客戶端訪問 zookeeper 的端口號
	clientPort=2181

	# the maximum number of client connections.
	# increase this if you need to handle more clients
	#maxClientCnxns=60
	#
	# Be sure to read the maintenance section of the 
	# administrator guide before turning on autopurge.
	#
	# http://zookeeper.apache.org/doc/current/zookeeperAdmin.html#sc_maintenance
	#
	# The number of snapshots to retain in dataDir
	#autopurge.snapRetainCount=3
	# Purge task interval in hours
	# Set to "0" to disable auto purge feature
	#autopurge.purgeInterval=1

8、保存並關閉 zoo.cfg 文件:
	
9、進入到 /usr/local/services/zookeeper/zookeeper-3.4.9/bin 目錄中：
	cd ../bin/

10、用 vim 打開 /etc/ 目錄下的配置文件 profile：
	vim /etc/profile
    並在其尾部追加如下內容：

	# idea - zookeeper-3.4.9 config start - 2016-09-08

	export ZOOKEEPER_HOME=/usr/local/services/zookeeper/zookeeper-3.4.9/
	export PATH=$ZOOKEEPER_HOME/bin:$PATH
	export PATH

	# idea - zookeeper-3.4.9 config start - 2016-09-08

11、使 /etc/ 目錄下的 profile 文件即可生效：
	source /etc/profile

12、啟動 zookeeper 服務：
	zkServer.sh start
    如打印如下信息則表明啟動成功：
	ZooKeeper JMX enabled by default
	Using config: /usr/local/services/zookeeper/zookeeper-3.4.9/bin/../conf/zoo.cfg
	Starting zookeeper ... STARTED

13、查詢 zookeeper 狀態：
	zkServer.sh status

14、關閉 zookeeper 服務：
	zkServer.sh stop
    如打印如下信息則表明成功關閉：
	ZooKeeper JMX enabled by default
	Using config: /usr/local/services/zookeeper/zookeeper-3.4.9/bin/../conf/zoo.cfg
	Stopping zookeeper ... STOPPED

15、重啟 zookeeper 服務：
	zkServer.sh restart
    如打印如下信息則表明重啟成功：
	ZooKeeper JMX enabled by default
	Using config: /usr/local/services/zookeeper/zookeeper-3.4.9/bin/../conf/zoo.cfg
	ZooKeeper JMX enabled by default
	Using config: /usr/local/services/zookeeper/zookeeper-3.4.9/bin/../conf/zoo.cfg
	Stopping zookeeper ... STOPPED
	ZooKeeper JMX enabled by default
	Using config: /usr/local/services/zookeeper/zookeeper-3.4.9/bin/../conf/zoo.cfg
	Starting zookeeper ... STARTED

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